Meso- and submesoscale variability in tropical upwelling regimes
Tropical upwelling regimes are characterized by pronounced meso- and submesoscale variability such as eddies and filaments. Understanding these phenomena is crucial as they cause horizontal and vertical fluxes of mass, heat andsolutes such as nutrients and oxygen. Additionally strong physical-biogeochemical coupling exists at the associated scales. However, the high temporal and spatial variability of these processes poses a large challenge to observational studies.
Multi-platform observations and adaptive sampling
The shipbased sampling is guided by the glider observations, which are accessed in nearreal time via satellite. This adaptive sampling strategy allows us to target the physical-biogeochemical coupling in specific phenomena such as eddies or filaments.
|Figure 1: The sea surface temperature (SST) in the Peruvian upwelling regime observed by MODIS Aqua with 1 km horizontal resolution is shown on the left. A zoom into the near-surface temperature field associated with a submesoscale filament observed by a glider is shown on the right. (Thomsen et al. 2016).|